Funding Overview
<cite index="12-1">Together AI, which positions itself as making it dramatically cheaper and easier to run open-source AI models at scale, announced an $800 million Series C financing at an $8.3 billion post-money valuation on July 1, 2026.</cite> <cite index="12-2">The round was led by Aramco Ventures, with participation from Vista Equity Partners, General Catalyst, Emergence Capital, Nvidia, March Capital, Pegatron, S Ventures (SentinelOne), and others.</cite>
<cite index="4-1">The new Series C brings Together AI's total funding to roughly $1.3 billion.</cite> <cite index="4-4,4-5">In February 2025, the company closed a $305 million Series B at a $3.3 billion valuation, led by General Catalyst. Before that, it raised a $102.5 million Series A in 2023 led by Kleiner Perkins, with participation from Nvidia and Emergence Capital.</cite>
Business Model and Market Position
<cite index="18-7,18-8">The San Francisco-based company has never built a proprietary foundation model; instead, it built the cloud infrastructure that lets enterprises run other companies' open-source Large Language Models (LLMs) cheaply and at scale — a bet that has pushed its annual bookings past $1.15 billion.</cite>
<cite index="12-4">Together AI has emerged as the infrastructure layer for the alternative to proprietary AI, helping companies train and run workloads on open models like DeepSeek, Nemotron, MiniMax, and Kimi at a fraction of the cost of closed systems, with comparable or better performance.</cite> <cite index="5-9">The company disclosed that its annualized bookings for the last quarter exceeded $1.15 billion, with customers saving between 6x and 60x in costs by using open-source models on its platform compared to proprietary models.</cite>
<cite index="18-17">Vipul Ved Prakash founded the company in 2022 alongside Ce Zhang, Percy Liang, and Tri Dao, with the conviction that running frontier-quality AI in production did not require paying frontier-lab prices.</cite> <cite index="18-20">The company now serves more than one million developers and thousands of enterprise customers, including Cursor and Cognition.</cite>
<cite index="17-13">The platform supports over 200 open-source models across all modalities — chat, image, audio, vision, code, and embeddings — and is powered by Together AI's proprietary inference engine, built on research innovations including FlashAttention-3 kernels and advanced quantization techniques.</cite>
Use of Proceeds and Infrastructure Plans
<cite index="6-19">Together AI plans to use the new capital to expand its inference platform, launch new products, and scale its compute infrastructure by roughly 50 times over the next five years.</cite> <cite index="16-5">The capital will also support commitments for over 500 megawatts (MW) of compute capacity.</cite> <cite index="16-15">Specific infrastructure partnerships include Hypertec for 36,000 Nvidia GB200 Graphics Processing Units (GPUs) and VC2 for more than 50 metro inference data centers.</cite>
Competitive Landscape
<cite index="14-4">Together AI operates as a cloud platform for running open-source AI models, positioning itself between the hyperscalers and developers who want alternatives to closed systems.</cite> Rival open-source inference providers have also attracted significant capital in recent months. <cite index="6-10">Fireworks AI raised $250 million at a four-billion-dollar valuation in October 2025, also betting on open-source inference infrastructure.</cite> <cite index="15-16">Groq raised $650 million in June 2026 to rebuild as an AI inference cloud provider, following Nvidia's approximately $20 billion license of Groq's Language Processing Unit (LPU) technology in late 2025.</cite> <cite index="20-1">CoreWeave went public in 2025 and now trades at a multiple many times its last private valuation, reflecting the differentiated positioning of open-model specialization versus pure GPU-rental competitors.</cite>
Investor Rationale
<cite index="15-22">Aramco Ventures — the venture arm of Saudi Aramco, the world's largest oil company by revenue — leading an open-weight inference cloud round marks a notable expansion of Gulf sovereign capital into US AI infrastructure.</cite> <cite index="12-8,12-9">Aramco Ventures Managing Director Abhishek Shukla described AI infrastructure as "the biggest infrastructure project in human history" and said Together AI has built "the platform that makes open source models genuinely usable at enterprise scale."</cite>
<cite index="8-5">Co-founder and Chief Executive Officer Vipul Ved Prakash stated that "intelligence is becoming a foundational resource for the modern economy, every bit as essential as electricity, bandwidth or capital."</cite>